Figure 1: MMS observations of a reconnection exhaust.
From: Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave
(a) Illustration of the MMS constellation near the dayside magnetopause on 30 December 2015. MMS entered a southward flowing reconnection exhaust in the separatrix region on the magnetospheric (msp) side of the magnetopause. (b–i) Plasma parameters from MMS4 across the jet are shown from 22:23 to 22:30 UT. The density increased to ∼10 cm−3 (d) and −Vz increased by ∼200 km s−1 (e). No rotation in the magnetic field (B) indicated that the spacecraft remained inside the magnetosphere during this time period. Approximately 1 Hz waves (h,i) were observed to be localized in a region of enhanced ion temperature anisotropy, with 
/T||∼2. H+ dominated the ion composition during this time period.
